Rotary assembly of interfitting counterparts



M y 1945- 'F. w. TELLKAMP 2,374,845

ROTARY ASSEMBLY OF INTERFITTING COUNTERPARTS Filed April 7, 1944 w at WePatented May 1, 1945 2,374,845 I ROTARY ASSEMBLY OFINTERFITTINGCOUNTERPABTS Frederick w. Tellkamp, o an; as. a Application April 7,1944, Serial No.5'29,9 1 s" was. (01. 74- 434) This invention relates torotors. to rotary bodies and to assembly bodies, in'the class of machineelements; and inasmuch as it is applicable to various usesandmodifications, and consists mainly in theshape of each of itscounterpart elements and the assembly of same into the form of a wheelor'rotor, I choose to call it arotary assemblyof interfittingcounterparts a i a The main object. of this invention is to providethree substantially. counterpart elements of. suchform. or shape thatthey are capable of be-- ing-interfittedinto the formof a. wheel, rotor,

pulley, substantially circular magnet, frictional gear, or toothed gear.l

Other objects and important feature are pointed outor impliedin thefollowing description in connection withthe accompanying drawing inwhich:

Fig. v1 aside-elevation of an assembly es,- pecially..designed for .useas a .triplex magnet mounted on an axle fonrotation. I

tween walls ldl'is substantially equal to the width i of the respectiverelatively thin portions If; in

Fig. 2 is a sideview of one of the three counterpart metal elementsshown interfitted in Fig. 1. Fig. 3 is a lower edge view of the elementshown inFig 2.

Fig. 4 is a which the counterpart element areshownas of wood and havetheir ,arcuate portions adjoined so the periphery is continuous; amodified form of hub alsobeing shown with an axle therein.

F g. 5 isa side elevation of oneof thecounter part elements showninterfitted in Fig. 4.

Fig. 6 is a sectional view'taken along the line 66 of Fig. 5, adjoinedto a similar second element for indicating how the width of theperipher'y may be increased for increasing traction, as when used as apulley or as a ground-wheel.

Referring to the drawing in detail, wherein, similar reference-numeralsrefer to similar parts throughout the several views, the invention isdescribed in detail as follows:

Since each of the three elements or integral units 1 are not onlysimilar, but are counterparts, they are each similarly identified; andeach is substantially U-shaped and consists of an intermediate bar orrelatively long portion 1a, and two relatively short arcuate portions 1bthat form the magnetic poles when magnetized by any appropriate means(not shown). The barfla of each unit I is diagonally cross-notched at 10to form pairs of shoulders or walls 1d. These notches terminate atrelatively thin portions If, the thickness of which is substantiallyequal to the depth of the adjacent notch and of each similar notch,while the width of each notch (beside elevationof a modification. in

other words, each notch 1c is equi-lateraland equi-dimensional with therespective inner surfaces of the respeotive thin portions II. Therefore,when interi'ltted"asshown in Fig. 1, each pair of shoulders .or wallsldfit closely against two opposite edges of one of the relatively thinportions 1;: therefore there is mutual interfitting of two relativelythin portions and two pairs of shoulders atea'ch joint between elements1.

Each notch 1c" is adjacent'toa respective oneofthe arcuate elements lb,and its wall Id are inclinedat about 30 degrees away from'the adjacentportion 'lbj-this being of vital importance in effecting theinterfitting of the three elements 1' so as to produ'cea substantiallyannular'rim'of the portions Ibsupported by the equilateral trianglecomposed'of'the three bars la; and though it is quite practical tointerfit these parts so tightly that they can be iriction'ally or'clampingly secured together and to fit a shaft of triangularcross-section in the triangular central opening, a more practical safeand economical means of se curing them in their interlockingarrangementis provided in connection with a shaft or axle 8 that. is secured in anexternally screw-threaded sleeve 9 whose periphery touches the centersof the three barsla. Two washer Ill-are fitted around the sleeve 9 andagainst opposite sides of the triangularassemblyfand two nuts H arescrewed onto the sleeve 9 and combine therewith to exert a clampingeifect on the flush surfaces of the three-bars 1a. Approximatelyone-half of the nearer washer and nut is broken away to disclose partsor the farther washer that has other parts indicated in the arcuatedotted line. When this device (of Fig. 1) is magnetized, it issusceptible of many uses such as those of a magneto, makeand-break"rotor, or rotary traction feeder or injector for pushing and pullingmetal bars, sheets, strips, cables etc., by contact therewith of itsperiphery while it is being rotated.

In the wooden devices shown in Figs. 4,5 and 6, the U-shaped elementsare shown at l2, their intermediate bars at IZa, their arcuate portionsat I 2b, their notches at I 20, their shoulders or walls at l2d, theirrelatively thin portions. at [2,, and

they have interlapped beveled extensions of the usual function of spokesand hub-connection secured with lue and/or screws I4. For safety,

all screw-heads are countersunk, including those that extends diagonallythereacross and terminates at a relatively thin portion and at shouldersthat vdiverge with respect to the adjacent one of said arms, the otherend-portion of said bar having therein a notch that extends diagonallyarcuate portion adjacent thereto, each notch being 1 of a ,proper widthbetween its adjoining shoulders 'for' receiving and inter fltting withone" of the relatively thin portions or a correlated one of said bars. v

of screws or bolts such as shown at l5 that con-' nect the hub-members16 to theacentersiof 'the bars lZa. The upper part of the nearer memberthese two members, especially th'e shoulders'or seats lfia that fitagainst the middle .jpar-ts' of-the respective bars l2a. A part of oneof the bars is broken away at right of the axle H, to show one of theseats Mia more clearly. Any number of holes lzwmaybe proyided to securegear-teeth in place if desired;

While his essential that'all the elements 1- be substantially or broadlycounterparts of one another, it is not essential that they be exact or.absolute counterparts as shown in Fig.1 and the same is tr-uecf theelements '12 ;,for whereas, each of these, elements are here shown withtheir notches in opposite sidesof the intermediate bar,

it is only essential that one'elementl and one element ll! be thusconstructedwhile-each of the correlated U -shaped element =may have bothnotchesjinthe same side; and while the forrr s shown have advantage ofminimum costin'forming these elements, and vin interlocking v theminically described in the" foregoing, nor to any specific, materials oruses' .for numerous modificationsmay be made within the-scope of theinventive ideas-as implied and claimed.

The following is 'clairnedas my invention:

1, In 'anelement o f ar-rotary assembly, a sub-- stantially U-shapedunit including a relatively,

long intermediate bar-and relatively short arms which latter-t protrudelaterallyffrom-the same side andopposite. ends of said intermediate barand are approximately parallel ,-to one another one end-portion of saidbar having therein anotch '2. In the element defined by claim 1, thefirstsaidnotch be'ing in the opposite'side of the bar 15- fronithe sidein which the second-said notch is I6 i broken off to disclosetheconstruction of "I e located,

3. The combination of three substantially counterpartaelements such asdefined in claim 1, said .barsbeing arranged in triangular relation,whilethe'shoulder's of the notches of each barcounterpaitielementsfrhaving bars :such as-defined inrclaim l1, thenotches/of each bar being 'in :op

posite asides thereof, said bars being. arranged in triangularrelationwhile each bar has its -:end-

portions respectively in front and in rear of-endportions of 'two' ofthe thre'eaba'rs, the shoulders of the notches ofeach bar'f'bei-ngengaged with lateral edges of relatively/thin portions of :two

correlated barsof thethre'et 5. The combination of xthreel wsttbstaritial ly 2 counterpartelements-such 'askdefi-nedain claimil,

said'elements "h'aving ltheirf intermediate :bars ar-,

ranged in trianglllar relation while the shoulders of each bar areengaged with the respective iateral edges ofthe relatively po1rtionsof"' two correlated substantially eounterpart elements,

and means engagedwith' the middle portions of counterpart elementsincluding bars suck-ins defined inclaim 1,- said'-bars being arrangedtoiorm an eeuil-ateral"trianglewhile*their-shoul'ders and relativelythin 'portions are interengagedin finterfi-tti-ng" relation, and -mean's-engaged witn the

